/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under 
 * the Apache License, Version 2.0  (the "License"); you may not use this file
 * except in compliance with the License.  
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

/*****************************************************************************

  Source      emm_reg.c

  Version     0.1

  Date        2012/10/16

  Product     NAS stack

  Subsystem   EPS Mobility Management

  Author      Frederic Maurel

  Description Defines the EMMREG Service Access Point that provides
        registration services for location updating and attach/detach
        procedures.

*****************************************************************************/
#include <assert.h>

#include "common_defs.h"
#include "log.h"
#include "emm_reg.h"
#include "commonDef.h"
#include "emm_fsm.h"


/****************************************************************************/
/****************  E X T E R N A L    D E F I N I T I O N S  ****************/
/****************************************************************************/

/****************************************************************************/
/*******************  L O C A L    D E F I N I T I O N S  *******************/
/****************************************************************************/

/****************************************************************************/
/******************  E X P O R T E D    F U N C T I O N S  ******************/
/****************************************************************************/

/****************************************************************************
 **                                                                        **
 ** Name:    emm_reg_initialize()                                      **
 **                                                                        **
 ** Description: Initializes the EMMREG Service Access Point               **
 **                                                                        **
 ** Inputs:  None                                                      **
 **      Others:    None                                       **
 **                                                                        **
 ** Outputs:     None                                                      **
 **      Return:    None                                       **
 **      Others:    NONE                                       **
 **                                                                        **
 ***************************************************************************/
void
emm_reg_initialize (
  void)
{
  OAILOG_FUNC_IN (LOG_NAS_EMM);
  /*
   * Initialize the EMM state machine
   */
  emm_fsm_initialize ();
  OAILOG_FUNC_OUT (LOG_NAS_EMM);
}

/****************************************************************************
 **                                                                        **
 ** Name:    emm_reg_send()                                            **
 **                                                                        **
 ** Description: Processes the EMMREG Service Access Point primitive       **
 **                                                                        **
 ** Inputs:  msg:       The EMMREG-SAP primitive to process        **
 **      Others:    None                                       **
 **                                                                        **
 ** Outputs:     None                                                      **
 **      Return:    RETURNok, RETURNerror                      **
 **      Others:    None                                       **
 **                                                                        **
 ***************************************************************************/
int
emm_reg_send (
  const emm_reg_t * msg)
{
  OAILOG_FUNC_IN (LOG_NAS_EMM);
  int                                     rc = RETURNok;

  /*
   * Check the EMM-SAP primitive
   */
  emm_reg_primitive_t                     primitive = msg->primitive;

  assert ((primitive > _EMMREG_START) && (primitive < _EMMREG_END));
  /*
   * Execute the EMM procedure
   */
  rc = emm_fsm_process (msg);
  OAILOG_FUNC_RETURN (LOG_NAS_EMM, rc);
}

/****************************************************************************/
/*********************  L O C A L    F U N C T I O N S  *********************/
/****************************************************************************/
